oil industry
refining industry
oil business

They don't feel this is the time to move in the oil business.

He saw that there was a great future in the oil business.

"You get used to watching out for yourself in the oil business."

After the war, he got himself involved in the oil business.

He also knew all there was to know about the oil business.

At home, the economy of the oil business had created the need for his father to return to California.

I wish you'd tell me a little more about this oil business.

He decided to start in the oil business just as his father had.

He came to Texas to find work in the oil business.

Still the center of the nation's oil business, it is also now the state with the most wind power production.